Preheat the Instant Pot using the Saute-High function on the Instant Pot. Add the Italian sausage and cook for about 5-8 minutes until it turns brown.
Remove the cooked sausage from the instant pot using a slotted spoon. Then add the other ingredients like the garlic, carrots, onion, and celery, and cook for 10 mins until they have softened.
Return the cooked Italian sausage to the Instant Pot. Add the white beans, chicken stock, Italian seasoning, salt, and pepper.
Put the lid back onto the Instant Pot and ensure the valve is set to the “sealing” position. Set the timer for 5 minutes, and after 5 minutes, manually release the pressure by switching the valve to the “venting position.”
Add the kale and heavy cream. Stir and wait for 2 minutes, allowing the kale to wilt. Once it’s done, serve the soup immediately.
If you have leftovers, store them in an airtight container in the refrigerator for up to three days.